/* ============================================================
   悦盈稳当 · 共享样式表 /assets/site.css
   侧边品牌轨道 + 框景首屏 + 战术面板式数据语言
   ============================================================ */

/* ---------- 1. 变量与重置 ---------- */
:root {
  --bg: #0E1622;
  --panel: #16202E;
  --overlay: #1F2C3C;
  --orange: #FF6B2C;
  --cyan: #22E0C8;
  --amber: #FFB03A;
  --text: #D7E2EE;
  --muted: #93A6BA;
  --bright: #D9FFF8;
  --line: #2B3D52;
  --line-soft: #3D5A78;
  --ok: #3DD68C;
  --danger: #FF5C7A;
  --grad: linear-gradient(90deg, #FF6B2C, #22E0C8);

  --rail-w: 0px;
  --header-h: 64px;
  --maxw: 1280px;
  --gap: 18px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --dur: 180ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(43, 61, 82, 0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 61, 82, 0.22) 1px, transparent 1px);
  background-size: 100% 72px, 72px 100%;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  padding: var(--header-h) 0 0 var(--rail-w);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video, picture { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
strong, b { color: var(--bright); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 1px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: calc(var(--rail-w) + 10px);
  z-index: 140;
  transform: translateY(-220%);
  padding: 0.5rem 1rem;
  background: var(--cyan);
  color: #04231F;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 2px;
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 2. 中文排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  color: var(--bright);
  line-height: 1.18;
  font-weight: 700;
}
h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
}
h2 { font-size: 1.8rem; letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

.mono { font-family: var(--font-mono); }

.prose { max-width: 70ch; }
.prose p { margin: 0 0 1.2em; }
.prose h2 { margin-top: 1.8em; }
.prose h3 { margin-top: 1.4em; color: var(--text); }
.prose ul, .prose ol { list-style: square; padding-left: 1.2em; margin: 0 0 1.2em; }
.prose li { margin-bottom: 0.5em; }
.prose li::marker { color: var(--orange); }
.prose a { color: var(--cyan); border-bottom: 1px solid rgba(34, 224, 200, 0.4); }

/* ---------- 3. 布局容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(14px, 3vw, 32px);
}

.section { padding: clamp(44px, 6vw, 88px) 0; }
.section--top { padding-top: clamp(26px, 4vw, 52px); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.section-head p { color: var(--muted); max-width: 62ch; }

.grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}
.grid > * { grid-column: 1 / -1; }
.grid--tight { --gap: 12px; }

@media (min-width: 768px) {
  .span-6 { grid-column: span 6; }
  .span-4 { grid-column: span 4; }
}
@media (min-width: 1024px) {
  .span-3 { grid-column: span 3; }
  .span-5 { grid-column: span 5; }
  .span-7 { grid-column: span 7; }
  .span-8 { grid-column: span 8; }
  .span-9 { grid-column: span 9; }
  .span-12 { grid-column: 1 / -1; }
}

/* ---------- 4. 索引与刻度语汇 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan);
}

.rule { height: 1px; border: 0; margin: 0; background: var(--line); }
.rule--tick {
  height: 9px;
  border: 0;
  margin: 0;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 10px);
  border-bottom: 1px solid var(--line);
}

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.1;
  color: var(--amber);
}
.stat-label { font-size: 0.78rem; letter-spacing: 0.06em; color: var(--muted); }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.btn:hover {
  color: var(--bright);
  background: var(--overlay);
  border-color: var(--line-soft);
  transform: translateY(-2px);
}
.btn--primary {
  border-color: rgba(255, 107, 44, 0.55);
  background: linear-gradient(90deg, rgba(255, 107, 44, 0.22), rgba(34, 224, 200, 0.16));
  color: var(--bright);
}
.btn--primary:hover {
  border-color: var(--orange);
  box-shadow: 0 8px 22px rgba(255, 107, 44, 0.18);
}
.btn--ghost { color: var(--muted); border-color: var(--line); }
.btn--ghost:hover { color: var(--cyan); border-color: rgba(34, 224, 200, 0.55); }
.btn--sm { padding: 0.42rem 0.8rem; font-size: 0.85rem; }
.btn--block { width: 100%; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--cyan);
}
.link-arrow::after { content: "→"; transition: transform var(--dur) var(--ease); }
.link-arrow:hover::after { transform: translateX(4px); }

/* ---------- 6. 标签与状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.18rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(31, 44, 60, 0.6);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.tag--accent {
  background: var(--orange);
  border-color: var(--orange);
  color: #12161C;
  font-weight: 700;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--muted);
}
.status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 1px;
  background: var(--muted);
}
.status--ok { color: var(--ok); }
.status--ok::before { background: var(--ok); }
.status--warn { color: var(--amber); }
.status--warn::before { background: var(--amber); }
.status--alert { color: var(--danger); }
.status--alert::before { background: var(--danger); }

/* ---------- 7. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--line-soft); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb [aria-current="page"] { color: var(--text); }

/* ---------- 8. 卡片、面板、框景 ---------- */
.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--panel);
  padding: clamp(16px, 2.2vw, 24px);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}
.card:hover, .card:focus-within {
  transform: translateY(-3px);
  border-color: var(--line-soft);
  background: var(--overlay);
}
.card--accent { overflow: hidden; }
.card--accent::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad);
}
.card-title { margin: 0 0 6px; font-size: 1.25rem; color: var(--bright); }
.card-text { margin: 0; font-size: 0.95rem; color: var(--muted); }

.panel {
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--panel);
  padding: clamp(16px, 2.4vw, 28px);
}

.tick-frame {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(31, 44, 60, 0.55), rgba(14, 22, 34, 0.25));
  padding: clamp(20px, 3vw, 40px);
}
.tick-frame::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad);
}
.tick-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background:
    linear-gradient(var(--cyan), var(--cyan)) 0 0 / 12px 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 0 0 / 2px 12px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 100% 100% / 12px 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 100% 100% / 2px 12px no-repeat;
}

/* ---------- 9. 响应式图像容器（页面阶段放置图片） ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
  background-color: var(--panel);
  background-image:
    radial-gradient(120% 90% at 12% 8%, rgba(34, 224, 200, 0.16), transparent 58%),
    radial-gradient(90% 80% at 92% 92%, rgba(255, 107, 44, 0.18), transparent 55%);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(43, 61, 82, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 61, 82, 0.45) 1px, transparent 1px);
  background-size: 100% 32px, 32px 100%;
  pointer-events: none;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(215, 226, 238, 0.06) 0 1px,
    transparent 1px 14px
  );
  pointer-events: none;
}
.media-frame > img,
.media-frame > picture > img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--banner { aspect-ratio: 32 / 9; }
.media-frame-caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 10. 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled] {
  background: rgba(14, 22, 34, 0.96);
  border-bottom-color: var(--line);
  box-shadow: 0 12px 30px rgba(3, 7, 12, 0.45);
}
body.is-nav-open .site-header {
  background: rgba(14, 22, 34, 0.98);
  border-bottom-color: var(--line);
}

.header-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 95;
  width: var(--rail-w);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0 24px;
  background: linear-gradient(180deg, #101A27, #0B131D);
  border-right: 1px solid var(--line);
}
@media (min-width: 1024px) {
  .header-rail { display: flex; }
}
.rail-glyph {
  position: relative;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  border: 1px solid var(--orange);
  background: linear-gradient(135deg, rgba(255, 107, 44, 0.35), rgba(34, 224, 200, 0.28));
}
.rail-glyph::before {
  content: "";
  position: absolute;
  inset: 5px;
  background: var(--cyan);
  opacity: 0.75;
}
.rail-label {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.3em;
  color: var(--muted);
}
.rail-ruler {
  flex: 1 1 auto;
  width: 9px;
  margin: 18px 0;
  border-left: 1px solid var(--line);
  background-image: repeating-linear-gradient(
    180deg,
    var(--line) 0 1px,
    transparent 1px 12px
  );
}
.rail-node {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.header-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  height: var(--header-h);
  max-width: calc(var(--maxw) + var(--rail-w));
  margin: 0 auto;
  padding: 0 clamp(14px, 3vw, 32px) 0 calc(var(--rail-w) + clamp(14px, 3vw, 32px));
}

.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand-glyph {
  position: relative;
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--orange), var(--cyan));
}
.brand-glyph::before {
  content: "";
  position: absolute;
  inset: 6px;
  background: var(--bg);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-name {
  font-size: 1.02rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--bright);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.site-nav { display: flex; align-items: center; margin-left: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  counter-reset: nlink;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0.5rem 0.7rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--muted);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}
.nav-link::before {
  counter-increment: nlink;
  content: "0" counter(nlink);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: #4A627C;
}
.nav-link:hover {
  color: var(--bright);
  background: var(--overlay);
  border-color: var(--line);
}
.nav-link[aria-current="page"] {
  color: var(--bright);
  background: var(--overlay);
  border-color: var(--line);
}
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: -1px;
  height: 2px;
  background: var(--grad);
}

.nav-aside { display: none; }
.nav-aside-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 0.48rem 0.62rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  cursor: pointer;
  color: var(--muted);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}
.nav-toggle:hover { color: var(--cyan); border-color: rgba(34, 224, 200, 0.5); }
.nav-toggle-bars { position: relative; display: block; width: 18px; height: 12px; }
.nav-toggle-bars span {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle-bars span:nth-child(1) { top: 0; }
.nav-toggle-bars span:nth-child(2) { top: 5px; }
.nav-toggle-bars span:nth-child(3) { top: 10px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}
.nav-toggle-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.nav-scrim { display: none; }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
}
.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: var(--grad);
}

@media (min-width: 1024px) and (max-width: 1199px) {
  .nav-link::before { display: none; }
  .nav-link { padding: 0.45rem 0.55rem; font-size: 0.88rem; }
  .brand-sub { display: none; }
}

/* ---------- 11. 移动端抽屉导航 ---------- */
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .header-actions .btn--sm { display: none; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    width: min(86vw, 340px);
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: calc(var(--header-h) + 18px) 18px 22px;
    overflow-y: auto;
    background: linear-gradient(180deg, #16202E, #0E1622);
    border-left: 1px solid var(--line);
    transform: translateX(102%);
    transition: transform 200ms var(--ease);
  }
  .site-nav[data-open] { transform: translateX(0); }

  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-link {
    padding: 0.85rem 0.9rem;
    font-size: 1rem;
    border-color: var(--line);
    background: rgba(31, 44, 60, 0.5);
  }
  .nav-link[aria-current="page"]::after { left: 0.9rem; right: 0.9rem; bottom: 0; }

  .nav-aside {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: auto;
    padding-top: 22px;
    border-top: 1px solid var(--line);
  }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 0;
    border: 0;
    background: rgba(5, 9, 15, 0.62);
    opacity: 0;
    pointer-events: none;
    cursor: pointer;
    transition: opacity 200ms var(--ease);
  }
  body.is-nav-open .nav-scrim { opacity: 1; pointer-events: auto; }
  body.is-nav-open { overflow: hidden; }
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  margin-top: clamp(40px, 7vw, 90px);
  padding-top: clamp(34px, 5vw, 56px);
  background: linear-gradient(180deg, #111B27, #0B121B);
  border-top: 1px solid var(--line);
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(14px, 3vw, 32px);
}
.footer-grid {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  grid-template-columns: 1fr;
}
@media (min-width: 620px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .footer-grid { grid-template-columns: 1.3fr 1fr 1.3fr 1fr; } }

.footer-brand { display: flex; flex-direction: column; gap: 12px; }
.footer-brand-name {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--bright);
}
.footer-brand-name::after {
  content: "";
  display: block;
  width: 64px;
  height: 2px;
  margin-top: 8px;
  background: var(--grad);
}
.footer-note { margin: 0; max-width: 34ch; font-size: 0.9rem; color: var(--muted); }
.footer-node {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.footer-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.footer-list { display: flex; flex-direction: column; gap: 9px; }
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}
.footer-link::before {
  content: "";
  width: 6px;
  height: 1px;
  background: var(--line);
  transition: width var(--dur) var(--ease), background var(--dur) var(--ease);
}
.footer-link:hover { color: var(--cyan); }
.footer-link:hover::before { width: 14px; background: var(--cyan); }

.footer-text {
  margin: 0 0 8px;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--muted);
  word-break: break-word;
}
.footer-key {
  display: inline-block;
  min-width: 3.2em;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.footer-base { margin-top: clamp(28px, 4vw, 44px); border-top: 1px solid var(--line); }
.footer-base-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px clamp(14px, 3vw, 32px);
  font-size: 0.8rem;
  color: var(--muted);
}
.footer-legal, .footer-icp {
  margin: 0;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.footer-icp { color: var(--muted); }

/* ---------- 13. 显现与降级 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 260ms var(--ease), transform 260ms var(--ease);
}
[data-reveal][data-visible] { opacity: 1; transform: none; }

@media (min-width: 1200px) {
  :root { --rail-w: 80px; }
}
@media (min-width: 1024px) and (max-width: 1199px) {
  :root { --rail-w: 64px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .card:hover, .card:focus-within, .btn:hover { transform: none; }
  .link-arrow:hover::after { transform: none; }
  .site-nav { transition: none; }
}